A study of scientific concepts in chemistry among Mathayomsuksa 5 students, Mattayom Puranawat School on the topic of acids and bases by conducting class with experimental sets

Abstract

          This research aims to 1) develop and conduct an efficiency test of experimental sets on acids and bases, 2) compare students’ scientific concepts of acids and bases before and after learning using the experimental sets, and 3) study the students’ post-learning experimental skill level on acids and bases using the experimental sets. This research was the experimental research. Simple random sampling was used to select 36 students from Mathayomsuksa 5 at Puranawat High School in the first semester of the 2022 academic year. The research instruments included 1) learning management plans for chemistry 4 subjects on the topic of acids and bases, 2) the acid-base experimental sets, 3) a scientific conceptual test on acids and bases, and 4) an experimental skill test on acids and bases. Statistics used in data analysis included mean, percentage, standard deviation, and comparing means with the 80/80 criterion. To analyze and compare scientific concepts between pre- and post-learning, mean, standard deviation, and dependent sample t-tests were used. To analyze and compare post-experimental skills with constant values, mean, standard deviation, and one sample t-tests were used.
          The results showed that 1) the efficiency of the acid-base experimental set was 82.52/82.22, which was higher than the standard criteria set. Students’ scientific concepts of acids and bases after learning ( =24.08, S.D.=2.38) were higher than those before ( =11.06, S.D.=2.89) with statistical significance at the .05 level. After conducting the experimental sets on acids and bases, the mean experimental skill level ( =7.84) was higher than the constant 7.20, indicating good proficiency and statistical significance at the .05 level.